722147 has 2 divisors, whose sum is σ = 722148. Its totient is φ = 722146.

The previous prime is 722123. The next prime is 722149. The reversal of 722147 is 741227.

It is a strong prime.

It is an emirp because it is prime and its reverse (741227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 722147 - 2⁸ = 721891 is a prime.

Together with 722149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (722149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361073 + 361074.

It is an arithmetic number, because the mean of its divisors is an integer number (361074).

2⁷²²¹⁴⁷ is an apocalyptic number.

722147 is a deficient number, since it is larger than the sum of its proper divisors (1).

722147 is an equidigital number, since it uses as much as digits as its factorization.

722147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 784, while the sum is 23.

The square root of 722147 is about 849.7923275719. The cubic root of 722147 is about 89.7170951916.

The spelling of 722147 in words is "seven hundred twenty-two thousand, one hundred forty-seven", and thus it is an iban number.